We purchase several colors with different colors so that garbage can be sorted out and consolidate it. Because it is a big one, it is hard to carry and purchase at a real store, so it is convenient because it will be free shipping on bulk buying. The price of the item is also inexpensive, I think that it is hard to break so it is easy to make. Although it is not stated, because it also comes with a classification sticker, it was okay to save labor.